Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Please set this up

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 245
Joined: Thu Aug 16, 2007 12:41 pm
by bacali » Tue Nov 25, 2008 8:09 am
Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy?


(1) She bought $4.40 worth of stamps.
(2) She bought an equal number of $0.15 stamps and $0.29 stamps.


OA: A
Top
Join the discussion
Source: — Data Sufficiency |
Legendary Member
Posts: 541
Joined: Thu May 31, 2007 6:44 pmFollowed by: 3 members
Location: UK
Thanked: 21 times
GMAT Score:680

by rohangupta83 » Tue Nov 25, 2008 8:38 am
Let number of $0.15 stamps = x
number of $0.29 stamps = y

statement 1
x(0.15) + y(0.29) = 4.40

two unknowns 1 eq - Not Suff.

statement 2
x = y------------------Insufficient

Together

Sufficient. imo C

I don't know how it is A
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 207
Joined: Sun Mar 11, 2007 6:16 pm
Location: Mumbai
Thanked: 11 times

by jimmiejaz » Tue Nov 25, 2008 8:41 am
From 1, We have .15x+.29y=4.40
We may think that since we have 2 variables, we cant solve this equation, but if we plug values we will get the answer.
Since this equation contains a value of 0.29, and the total is 4.40, the stamps with value of 0.29 is a multiple of 5.
only x=10,y=10 fits the bill.
Hence suff.

From 2, we have x=y but still we dont know the total. hence insuff.

Hence A.
What if i have not yet beat the beast, I know i will beat it!!!!!!!!
Top
Join the discussion
Legendary Member
Posts: 541
Joined: Thu May 31, 2007 6:44 pmFollowed by: 3 members
Location: UK
Thanked: 21 times
GMAT Score:680

by rohangupta83 » Tue Nov 25, 2008 8:43 am
jimmiejaz wrote:From 1, We have .15x+.29y=4.40
We may think that since we have 2 variables, we cant solve this equation, but if we plug values we will get the answer.
Since this equation contains a value of 0.29, and the total is 4.40, the stamps with value of 0.29 is a multiple of 5.
only x=10,y=10 fits the bill.
Hence suff.

From 2, we have x=y but still we dont know the total. hence insuff.

Hence A.
Nice explanation.. :)
Top
Join the discussion